INFO: rcu detected stall in sys

Date	Name	Commit	Repro	Result
2024/10/30	linux-6.1.y (ToT)	7ec6f9fa3d97	C	[report] INFO: rcu detected stall in corrupted
2024/04/14	upstream (ToT)	7efd0a74039f	C	[report] BUG: workqueue lockup
2024/10/30	upstream (ToT)	c1e939a21eb1	C	Didn't crash

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: rcu detected stall in sys_renameat cgroups mm				1	180d	180d	0/28	auto-obsoleted due to no activity on 2024/09/21 17:48

upstream

INFO: rcu detected stall in sys_renameat cgroups mm

180d

0/28

auto-obsoleted due to no activity on 2024/09/21 17:48

Created	Duration	User	Patch	Repo	Result
2024/11/27 04:45	3h03m	fix candidate		upstream	OK (0) job log
2024/06/12 21:12	12m	bisect fix		linux-6.1.y	error job log

Created

Duration

User

Patch

Repo

Result

2024/11/27 04:45

3h03m

fix candidate

upstream

OK (0) job log

2024/06/12 21:12

12m

bisect fix

linux-6.1.y

error job log

rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3842/1:b..l P4244/1:b..l (detected by 1, t=10502 jiffies, g=4621, q=247 ncpus=2) task:udevd state:R running task stack:0 pid:4244 ppid:3842 flags:0x00000004 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xee4/0x1c98 kernel/sched/core.c:6558 preempt_schedule_irq+0x8c/0x1b8 kernel/sched/core.c:6870 arm64_preempt_schedule_irq arch/arm64/kernel/entry-common.c:265 [inline] __el1_irq arch/arm64/kernel/entry-common.c:474 [inline] el1_interrupt+0x4c/0x68 arch/arm64/kernel/entry-common.c:486 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:581 __do_sys_getcwd fs/d_path.c:432 [inline] __se_sys_getcwd fs/d_path.c:411 [inline] read_seqbegin_or_lock+0x0/0x250 fs/d_path.c:411 d_absolute_path+0x13c/0x27c fs/d_path.c:233 tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline] tomoyo_realpath_from_path+0x24c/0x4cc security/tomoyo/realpath.c:271 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path2_perm+0x284/0x894 security/tomoyo/file.c:922 tomoyo_path_rename+0x184/0x1dc security/tomoyo/tomoyo.c:287 security_path_rename+0x154/0x1f0 security/security.c:1217 do_renameat2+0x754/0xe64 fs/namei.c:5016 __do_sys_renameat fs/namei.c:5069 [inline] __se_sys_renameat fs/namei.c:5066 [inline] __arm64_sys_renameat+0xc8/0xe4 fs/namei.c:5066 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 task:udevd state:R running task stack:0 pid:3842 ppid:1 flags:0x00000004 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xee4/0x1c98 kernel/sched/core.c:6558 preempt_schedule_common+0xf4/0x1e8 kernel/sched/core.c:6727 preempt_schedule+0x64/0x84 kernel/sched/core.c:6751 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0xa8/0xac kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] __wake_up_common_lock kernel/sched/wait.c:140 [inline] __wake_up_sync_key+0x124/0x1ac kernel/sched/wait.c:208 sock_def_readable+0x150/0x278 net/core/sock.c:3304 __netlink_sendskb net/netlink/af_netlink.c:1273 [inline] netlink_sendskb+0x98/0x154 net/netlink/af_netlink.c:1279 netlink_unicast+0x320/0x898 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1874 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x55c/0x848 net/socket.c:2514 ___sys_sendmsg net/socket.c:2568 [inline] __sys_sendmsg+0x26c/0x33c net/socket.c:2597 __do_sys_sendmsg net/socket.c:2606 [inline] __se_sys_sendmsg net/socket.c:2604 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2604 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 rcu: rcu_preempt kthread starved for 10507 jiffies! g4621 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:0 pid:16 ppid:2 flags:0x00000008 Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xee4/0x1c98 kernel/sched/core.c:6558 schedule+0xc4/0x170 kernel/sched/core.c:6634 schedule_timeout+0x1d8/0x344 kernel/time/timer.c:1965 rcu_gp_fqs_loop+0x2cc/0x1538 kernel/rcu/tree.c:1706 rcu_gp_kthread+0xc0/0x308 kernel/rcu/tree.c:1905 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 PID: 4344 Comm: syz-executor.2 Not tainted 6.1.86-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] pc : _raw_spin_unlock_irqrestore+0x58/0xac kernel/locking/spinlock.c:194 lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] lr : _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194 sp : ffff80001ebe7330 x29: ffff80001ebe7330 x28: dfff800000000000 x27: ffff80001ebe7400 x26: ffff0000ce6cef00 x25: ffff0000ce6cef00 x24: 0000000000000001 x23: ffff0000cde40018 x22: 0000000000000000 x21: ffff0000cde40000 x20: ffff0000ce6ceec0 x19: 0000000000000000 x18: 1fffe00019cd9d7e x17: ffff80001583d000 x16: ffff800008305ec4 x15: 00000000200fe000 x14: 1ffff00002b080b0 x13: dfff800000000000 x12: 0000000000000003 x11: 0000000000ff0100 x10: 0000000000000003 x9 : 0000000000000080 x8 : 00000000000000c0 x7 : ffff8000082dc99c x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff8000122ac6e0 x0 : ffff80019ebe8000 Call trace: arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x58/0xac kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] prepare_to_wait_exclusive+0x1bc/0x214 kernel/sched/wait.c:291 unix_wait_for_peer+0x138/0x2a8 net/unix/af_unix.c:1436 unix_dgram_sendmsg+0xd90/0x16c0 net/unix/af_unix.c:2043 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x55c/0x848 net/socket.c:2514 ___sys_sendmsg net/socket.c:2568 [inline] __sys_sendmmsg+0x318/0x7d8 net/socket.c:2654 __do_sys_sendmmsg net/socket.c:2683 [inline] __se_sys_sendmmsg net/socket.c:2680 [inline] __arm64_sys_sendmmsg+0xa0/0xbc net/socket.c:2680 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/04/13 20:16	linux-6.1.y	cd5d98c0556c	c8349e48	.config	console log	report	syz			[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan-arm64	INFO: rcu detected stall in sys_renameat

Crashes (1):

Assets (help?)